What is a lotion pump head?

Here's a breakdown of lotion pump heads, focusing on their practical design and everyday use:

1. Core Function
Dispenses thicker products like creams, serums, or body lotions in controlled amounts.
Generates a smooth stream instead of a spray/mist.

2. Key Structural Features

3. Why They're Not Interchangeable
Viscosity mismatch: Water-thin liquids leak around seals meant for creams.
Flow control: Serums dispensed through lotion pumps waste product (over-dispensing).
Clogging risk: Using a lotion pump for grainy scrubs jams the mechanism.

4. User Experience Design
Low actuation force: Easy pressing even with slippery hands (e.g., shower use).
Dose consistency: Each press delivers a uniform amount (e.g., 0.8ml–1.5ml).
Locking collars: Twist-to-lock prevents leaks in luggage (common in travel sizes).

5. Material Considerations
PP (polypropylene) bodies: Resist oils in lotions.
Silicone seals: Handle alcohol-based sanitizers (unlike rubber which degrades).
Metal springs: Avoid plastic fatigue with repeated use.

6. Failure Modes to Recognize

7. When Not to Use a Lotion Pump
Foaming products (e.g., hand soap) → Requires foam pump.
Runny liquids (toners, oils) → Leads to dripping/leaking.
High-pigment cosmetics (foundations) → Clogs tube over time.